Brake-shoe.



UNrrnn sra/rss PATENT OFFICE.`

BRAK-SHOE.

Specification of Letters Patent,

Patented Aug. 14, 1906.

Application led December 22, 1905. Serial No. 292,931.

.To all whom, t may concern,.-

Be it known that I, WILLIAM PERRY TAY- Lon, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Im rovements in Brake-Shoes, of

- which the ollowing is a specification.

This invention relates to an improved railway brake-shoe of that class which comprises a `body having a strengthening reinforcement embedded therein.

The principal objectof the invention is to strengthen the shoe-body against both longitudinal and transverse strain.

The invention also relates to certain details of construction, all of which will be fully and clearly hereinafter vdescribed and claimed, reference being had to the accompanying drawings, in which- Figure 1 is a vertical longitudinal section through the improved brake-shoe on line a a, Fig. 3. Fig. 2 is a vertical longitudinal section through the improved brake-shoe on line b l), Fig. 3. Fig. 3 is an enlarged vertical transverse section through the improved brake-shoe on line c c, Fig. 2. Fig. 4 is a face view of the improved brake-shoe. Fig. 5 is a horizontal longitudinal section through the improved brake-shoe on the curved line d d, Fig. 2. Fig. 6 is a detached face view of the reinforcing-bar. Figs. 7, 8, and 9 are enlarged detached side, end, and bottom plan views of one of the inserts.

The preferred adaptation of the invention illustrated in the drawings comprises a body, one or more longitudinal reinforcements embedded in the body, and one or more transverse inserts in the body.

In referring to the drawin s for the details of construction like numera s designate like parts.

The adaptation of this invention shown in thedrawings embodies a brake-shoe of that type known as the Master Oar-Builders standard type, and it consists of a cast body l, having a brake-face 2, which is curved in correspondence with the tread or perimeter of the car-wheel, two plate-like reinforcements 3, which are embedded in the shoe-body and extend longitudinally therethrough near the top surface thereof, and a series of inserts 4, which are embedded at intervals in the shoe-body below the reinforce ments 3.

The reinforcements 3 are practically hori- Zontal, except that they curve in correspondence with the curve of the castbody l, and they are each provided with a series of slots or perforations 5, in which portions of the cast metal of the body fit and interlock to rigidly secure the reinforcements in place.

The inserts 4 are each preferably a flat metal plate having top and bottom edges 6 and 7, which extend at a slight angle to each other, side edges 8 and 9, which gradually diverge from each other from the bottom edge. to the top, so that the top edge is wider than the bottom edge, and trapeziform faces which are parallel to each other. Each of these inserts is located in transverse position in the cast body, with its wider portion at the top, so that it is wedge-locked transversely in place therein and its lower or bottom edge extending through and on an even plane with the curved braking-face of the cast body.

The trapeziform faces ofthe inserts extend at right angles to the braking-face 2, so that the are vertical or nearly vertical in the cast bo y. The purpose of these inserts is not only to strengthen the cast body of the shoe in addition to the longitudinal reinforcements, but also to reduce or lessenthe frictional grip of the brake-shoe upon the car wheel sufficiently to prevent the complete stopping of the vrotation of the wheel while the train is moving fast, and thereby obviate 4in a great measure the flattening ,of the wheel surface through wear from sliding upon the rail. This is accomplished by having the curved braking-face 2 of the shoe composed in part of comparatively smooth surfaces of the bottom edges of the inserts, 'which are arranged at intervals and extend transversely across said face and are separated by the rough frictional surfaces of the cast metal. ln this construction the brakingface is formed of a transverse series of contrasting surfaces of metal in alternate sections of com- I paratively smooth and comparatively rough metal.

The plate-reinforcements 3 rest upon and are in contact with the top surface of the inserts, so that the reinforcements and inserts normally support and sustain each other.

Thebody is preferably cast of iron in the usual way around the reinforcements and inserts,w ich are in osition in the mold be- I fore the molten meta is poured.

. The reinforcements and inserts are usually stamped or otherwise formed of wrought iron or steel, although other suitable metal may be used, if desired.

The advanta es of this invention reside in reinforcing o the shoe both laterally and longitudinally.

In the following claims I use the words' cast body as a generic term and intend broadly to include any suitable form of metal body which is cast or formed in any other desirable manner.

It will be obvious that my invention may be variously modified without departing from the spirit and scope thereof.

I claim as my invention- 1. A brake-shoe having a cast body, a longi-tudinal reinforcement in said body and a series of transverse inserts wedge -locked transversely in said body.

2. A brake-shoe having a cast body, a longitudinal reinforcement 1n said body and a series of approximately vertical inserts wedge-locked transversely in said body.

3. A brake-shoe having a cast body, a longitudinal reinforcement in said body and a series of transversek inserts in said body having trapeziform faces.

4. A brake-shoe having a cast body and a series of vertical inserts wedge-locked transversely in said body and having their lower edges exposed and forming a portion of the braking-face of the shoe.

5. A brake-shoe having a cast body and a fairly-thin vertical insert wedge-locked transversely in said body.

6: A brake-shoe having a cast body and an insert wedge-locked in approximately vertical and transverse position in said body, said insert having two trapeziform faces and a lower edge which forms a portion of the braking-face of the shoe.

7 A brake-shoe having a cast body and an insert in said body having one of its surfaces in the form of a trapezium.

8. A brake-shoe having a cast body and a fairly-thin transverse insert in said body having all of its edges out of parallelism.

9. An insert for a brake-shoe having all of its edges out of parallelism.

10. A brake-shoe having a cast body and a short approximately vertical insert wedgelocked transversely in said body.

opposite trapeziform faces and all of its edges out of parallelism.

16. A brake-shoe comprising a body, a lon gitudinal reinforcement in said body and a series of transverse inserts in said body below and in contact with the reinforcement.

17. A brake-shoe having a cast body, two horizontal longitudinal reinforcements arranged side by side in said body and a series of transverse inserts wedge -locled transversely in said body with their top surfaces in contact withthe longitudinal reinforcements.

18. A brake-shoe having a cast body, two horizontal longitudinal reinforcements arranged side by side in said body and each having a series of perforations in which portions of the cast body lock, and a series of approximately vertical inserts wedge-locked transversely in said body below the longitudinal reinforcements.

19. A brake-shoe having a cast body at least one horizontal .longitudinal reinforcement in said cast body, and a series of vertical inserts wedge-locked transversely in said body and having their lower ed es exposed and forming a portion of the braling-face of the shoe and their upper edges in contact with the longitudinal reinforcement.

20. A brake-shoe having a cast body two longitudinal reinforcements embedded horizontally side by side in said body and curved in correspondence with the curve of the brakeshoe, and a series of fairly-thin vertical inserts located lat regular intervals in said body below the longitudinal reinforcements and wedge-locked transversely in said body.

WILLIAM PERRY TAYLOR Witnesses:

L. M. SANGSTER, GEO. A. NEUBAUER. 

